define(function (require, exports, module) {
    return function (jQuery) {

        /// <reference path="jquery-1.5.1.js" />
        /// <reference path="jquery.validate.js" />

        /*!
        ** Unobtrusive validation support library for jQuery and jQuery Validate
        ** Copyright (C) Microsoft Corporation. All rights reserved.
        */

        /*jslint white: true, browser: true, onevar: true, undef: true, nomen: true, eqeqeq: true, plusplus: true, bitwise: true, regexp: true, newcap: true, immed: true, strict: false */
        /*global document: false, jQuery: false */

        (function ($) {
            var $jQval = $.validator,
        adapters,
        data_validation = "unobtrusiveValidation";

            function setValidationValues(options, ruleName, value) {
                options.rules[ruleName] = value;
                if (options.message) {
                    options.messages[ruleName] = options.message;
                }
            }

            function splitAndTrim(value) {
                return value.replace(/^\s+|\s+$/g, "").split(/\s*,\s*/g);
            }

            function getModelPrefix(fieldName) {
                return fieldName.substr(0, fieldName.lastIndexOf(".") + 1);
            }

            function appendModelPrefix(value, prefix) {
                if (value.indexOf("*.") === 0) {
                    value = value.replace("*.", prefix);
                }
                return value;
            }

            function onError(error, inputElement) {  // 'this' is the form element
                var container = $(this).find("[data-valmsg-for='" + inputElement[0].name + "']"),
            replace = $.parseJSON(container.attr("data-valmsg-replace")) !== false;

                container.removeClass("field-validation-valid").addClass("field-validation-error");
                error.data("unobtrusiveContainer", container);

                if (replace) {
                    container.empty();
                    error.removeClass("input-validation-error").appendTo(container);
                }
                else {
                    error.hide();
                }
            }

            function onErrors(form, validator) {  // 'this' is the form element
                var container = $(this).find("[data-valmsg-summary=true]"),
            list = container.find("ul");

                if (list && list.length && validator.errorList.length) {
                    list.empty();
                    container.addClass("validation-summary-errors").removeClass("validation-summary-valid");

                    $.each(validator.errorList, function () {
                        $("<li />").html(this.message).appendTo(list);
                    });
                }
            }

            function onSuccess(error) {  // 'this' is the form element
                var container = error.data("unobtrusiveContainer"),
            replace = $.parseJSON(container.attr("data-valmsg-replace"));

                if (container) {
                    container.addClass("field-validation-valid").removeClass("field-validation-error");
                    error.removeData("unobtrusiveContainer");

                    if (replace) {
                        container.empty();
                    }
                }
            }

            function validationInfo(form) {
                var $form = $(form),
            result = $form.data(data_validation);

                if (!result) {
                    result = {
                        options: {  // options structure passed to jQuery Validate's validate() method
                            errorClass: "input-validation-error",
                            errorElement: "span",
                            errorPlacement: $.proxy(onError, form),
                            invalidHandler: $.proxy(onErrors, form),
                            messages: {},
                            rules: {},
                            success: $.proxy(onSuccess, form)
                        },
                        attachValidation: function () {
                            $form.validate(this.options);
                        },
                        validate: function () {  // a validation function that is called by unobtrusive Ajax
                            $form.validate();
                            return $form.valid();
                        }
                    };
                    $form.data(data_validation, result);
                }

                return result;
            }

            $jQval.unobtrusive = {
                adapters: [],

                parseElement: function (element, skipAttach) {
                    /// <summary>
                    /// Parses a single HTML element for unobtrusive validation attributes.
                    /// </summary>
                    /// <param name="element" domElement="true">The HTML element to be parsed.</param>
                    /// <param name="skipAttach" type="Boolean">[Optional] true to skip attaching the
                    /// validation to the form. If parsing just this single element, you should specify true.
                    /// If parsing several elements, you should specify false, and manually attach the validation
                    /// to the form when you are finished. The default is false.</param>
                    var $element = $(element),
                form = $element.parents("form")[0],
                valInfo, rules, messages;

                    if (!form) {  // Cannot do client-side validation without a form
                        return;
                    }

                    valInfo = validationInfo(form);
                    valInfo.options.rules[element.name] = rules = {};
                    valInfo.options.messages[element.name] = messages = {};

                    $.each(this.adapters, function () {
                        var prefix = "data-val-" + this.name,
                    message = $element.attr(prefix),
                    paramValues = {};

                        if (message !== undefined) {  // Compare against undefined, because an empty message is legal (and falsy)
                            prefix += "-";

                            $.each(this.params, function () {
                                paramValues[this] = $element.attr(prefix + this);
                            });

                            this.adapt({
                                element: element,
                                form: form,
                                message: message,
                                params: paramValues,
                                rules: rules,
                                messages: messages
                            });
                        }
                    });

                    jQuery.extend(rules, { "__dummy__": true });

                    if (!skipAttach) {
                        valInfo.attachValidation();
                    }
                },

                parse: function (selector) {
                    /// <summary>
                    /// Parses all the HTML elements in the specified selector. It looks for input elements decorated
                    /// with the [data-val=true] attribute value and enables validation according to the data-val-*
                    /// attribute values.
                    /// </summary>
                    /// <param name="selector" type="String">Any valid jQuery selector.</param>
                    $(selector).find(":input[data-val=true]").each(function () {
                        $jQval.unobtrusive.parseElement(this, true);
                    });

                    $("form").each(function () {
                        var info = validationInfo(this);
                        if (info) {
                            info.attachValidation();
                        }
                    });
                }
            };

            adapters = $jQval.unobtrusive.adapters;

            adapters.add = function (adapterName, params, fn) {
                /// <summary>Adds a new adapter to convert unobtrusive HTML into a jQuery Validate validation.</summary>
                /// <param name="adapterName" type="String">The name of the adapter to be added. This matches the name used
                /// in the data-val-nnnn HTML attribute (where nnnn is the adapter name).</param>
                /// <param name="params" type="Array" optional="true">[Optional] An array of parameter names (strings) that will
                /// be extracted from the data-val-nnnn-mmmm HTML attributes (where nnnn is the adapter name, and
                /// mmmm is the parameter name).</param>
                /// <param name="fn" type="Function">The function to call, which adapts the values from the HTML
                /// attributes into jQuery Validate rules and/or messages.</param>
                /// <returns type="jQuery.validator.unobtrusive.adapters" />
                if (!fn) {  // Called with no params, just a function
                    fn = params;
                    params = [];
                }
                this.push({ name: adapterName, params: params, adapt: fn });
                return this;
            };

            adapters.addBool = function (adapterName, ruleName) {
                /// <summary>Adds a new adapter to convert unobtrusive HTML into a jQuery Validate validation, where
                /// the jQuery Validate validation rule has no parameter values.</summary>
                /// <param name="adapterName" type="String">The name of the adapter to be added. This matches the name used
                /// in the data-val-nnnn HTML attribute (where nnnn is the adapter name).</param>
                /// <param name="ruleName" type="String" optional="true">[Optional] The name of the jQuery Validate rule. If not provided, the value
                /// of adapterName will be used instead.</param>
                /// <returns type="jQuery.validator.unobtrusive.adapters" />
                return this.add(adapterName, function (options) {
                    setValidationValues(options, ruleName || adapterName, true);
                });
            };

            adapters.addMinMax = function (adapterName, minRuleName, maxRuleName, minMaxRuleName, minAttribute, maxAttribute) {
                /// <summary>Adds a new adapter to convert unobtrusive HTML into a jQuery Validate validation, where
                /// the jQuery Validate validation has three potential rules (one for min-only, one for max-only, and
                /// one for min-and-max). The HTML parameters are expected to be named -min and -max.</summary>
                /// <param name="adapterName" type="String">The name of the adapter to be added. This matches the name used
                /// in the data-val-nnnn HTML attribute (where nnnn is the adapter name).</param>
                /// <param name="minRuleName" type="String">The name of the jQuery Validate rule to be used when you only
                /// have a minimum value.</param>
                /// <param name="maxRuleName" type="String">The name of the jQuery Validate rule to be used when you only
                /// have a maximum value.</param>
                /// <param name="minMaxRuleName" type="String">The name of the jQuery Validate rule to be used when you
                /// have both a minimum and maximum value.</param>
                /// <param name="minAttribute" type="String" optional="true">[Optional] The name of the HTML attribute that
                /// contains the minimum value. The default is "min".</param>
                /// <param name="maxAttribute" type="String" optional="true">[Optional] The name of the HTML attribute that
                /// contains the maximum value. The default is "max".</param>
                /// <returns type="jQuery.validator.unobtrusive.adapters" />
                return this.add(adapterName, [minAttribute || "min", maxAttribute || "max"], function (options) {
                    var min = options.params.min,
                max = options.params.max;

                    if (min && max) {
                        setValidationValues(options, minMaxRuleName, [min, max]);
                    }
                    else if (min) {
                        setValidationValues(options, minRuleName, min);
                    }
                    else if (max) {
                        setValidationValues(options, maxRuleName, max);
                    }
                });
            };

            adapters.addSingleVal = function (adapterName, attribute, ruleName) {
                /// <summary>Adds a new adapter to convert unobtrusive HTML into a jQuery Validate validation, where
                /// the jQuery Validate validation rule has a single value.</summary>
                /// <param name="adapterName" type="String">The name of the adapter to be added. This matches the name used
                /// in the data-val-nnnn HTML attribute(where nnnn is the adapter name).</param>
                /// <param name="attribute" type="String">[Optional] The name of the HTML attribute that contains the value.
                /// The default is "val".</param>
                /// <param name="ruleName" type="String" optional="true">[Optional] The name of the jQuery Validate rule. If not provided, the value
                /// of adapterName will be used instead.</param>
                /// <returns type="jQuery.validator.unobtrusive.adapters" />
                return this.add(adapterName, [attribute || "val"], function (options) {
                    setValidationValues(options, ruleName || adapterName, options.params[attribute]);
                });
            };

            $jQval.addMethod("__dummy__", function (value, element, params) {
                return true;
            });

            $jQval.addMethod("regex", function (value, element, params) {
                var match;
                if (this.optional(element)) {
                    return true;
                }

                match = new RegExp(params).exec(value);
                return (match && (match.index === 0) && (match[0].length === value.length));
            });

            adapters.addSingleVal("accept", "exts").addSingleVal("regex", "pattern");
            adapters.addBool("creditcard").addBool("date").addBool("digits").addBool("email").addBool("number").addBool("url");
            adapters.addMinMax("length", "minlength", "maxlength", "rangelength").addMinMax("range", "min", "max", "range");
            adapters.add("equalto", ["other"], function (options) {
                var prefix = getModelPrefix(options.element.name),
            other = options.params.other,
            fullOtherName = appendModelPrefix(other, prefix),
            element = $(options.form).find(":input[name=" + fullOtherName + "]")[0];

                setValidationValues(options, "equalTo", element);
            });
            adapters.add("required", function (options) {
                // jQuery Validate equates "required" with "mandatory" for checkbox elements
                if (options.element.tagName.toUpperCase() !== "INPUT" || options.element.type.toUpperCase() !== "CHECKBOX") {
                    setValidationValues(options, "required", true);
                }
            });
            adapters.add("remote", ["url", "type", "additionalfields"], function (options) {
                var value = {
                    url: options.params.url,
                    type: options.params.type || "GET",
                    data: {}
                },
            prefix = getModelPrefix(options.element.name);

                $.each(splitAndTrim(options.params.additionalfields || options.element.name), function (i, fieldName) {
                    var paramName = appendModelPrefix(fieldName, prefix);
                    value.data[paramName] = function () {
                        return $(options.form).find(":input[name='" + paramName + "']").val();
                    };
                });

                setValidationValues(options, "remote", value);
            });

            $(function () {
                $jQval.unobtrusive.parse(document);
            });
        } (jQuery));

    } 
});